Change-speed gearing.



w. PHILLIPS & H. w. ALLINGHAM.

CHANGE SPEED GEARING. APPLICATION FILED'NOV. 6. 1911.

Paten ted. May15,1917.

2 SHEET$SHEET I.

FIG l f O L i Q p a F j 77y .WITNESSES NTORS W. PHILLIPS 6: H. W.ALLINGHAM.

CHANGE SPEED GEARING.

APPLICATION FILED NOV. 6. 1911.

Patented May15,1917.

2 SHEETS-SHEET 2.

p P s. O a O A m M N1 N NN Nw U @N j A) 1 1W ix \H I [II I I w If I 1lrlvLwrll I lili lmflw A); w Q m N I Q NM; 7 1 1 ffff w M w w N O I QNm. M MN MW m NW WW N %N mw chains and also upon of Great Britain,

. ally. the wheel WALTER PHILLIPS AIN'D HENRY W. ALLINGHAM,

MORSE CHAIN COMPANY, OF ITHAOA, NEW YORK, A CORPORATION snares mannerwe;

OF LONDON, ENGLAND, ASSIGNORS T0 OF'NEW YORK.

CHANGE-STEED GEARING.

To all whom it may concern:

Be it known that we, WALTER PHILLIPS, a citizen of the United States,and HENRY WILLIAM A LINGHAM, a subject of the King both residing inLondon, England, have invented a certain new and useful Improvement inChange-Speed Gearing, of which the following. is a specification.

This-invention relates to change speed gearing and has for its object toprovide an improved arrangement of mechanism for transmitting powerdriven shaft. r I

In the case of self-propelled vehicles the mechanism necessary forobtaining variation in speed usually comprises a series of gear wheelsmounted upon the driving and driven shaft respectively, and cotiperatingwith a series of similar wheels mounted upon a lay'shaft; the Wholebeing located in a gear box. I

It is usual to divide the gear wheels into separate pairs, one wheel ofeach pair--usumounted upon the driving or driven shaft-beinglooselymounted upon the said shaft under normal conditions an arranged to bebrought into such a position as to be rotated by the shaft by means ofsuitable mechanism when desired.

In some cases intermeshing gear wheels are provided and it has also beenproposed to transmit power from the drivingto the driven shaft throughthe layshaft before referred to by means of drive chains connecting eachpair of gear wheels together.-

A feature of the preset invention consists in utilizing drive chains ofthis description and so arranging the clutch mechamsm 1 with that whenthe driving and driven shafts are directly connected, changing mechanismis thrown out of operation. By this means the wear upon the the teeth ofthe gear wheels is materially reduced, inasmuch are stationary when. the

mounted thereon,

shafts are coupled'todriving and driven gether. 3:

A further gear wheels are mounted,

whereby. a ready Application ifled November 6,

speed from-the driving to the the gear wheels and the other speed as thechains this shaft by means of one or more feathers feature of theinvention con sists in a' special construction of the gear wheels or ofthe bearings or shafts. on which.

Patented may as, ism.

1911. Serial No. 658,666.

tion for the increaseinthe length of the chalns, due to wear, may beobtained.

The invention is illustrated in the abcomn panying drawings, of whichFigure 1 1s a sectional plan view of one form of change gearingembodying the invention. Fig. 2 is a view similar to a portion of Fig. 1but illustrating modified constructions of the gear wheels and bearingsfor one of the shafts, which may be employed.

Referring now to Fig. 1, the change speed gearing illustrated comprisesa gear box or casing, 1, within which are located a driving shaft, '2, adriven shaft 3, and a lay shaft 4, the inner end of the shaft 2 beingarranged to enter a socket in'the inner end of the shaft 3, so that thedriving and driven shafts are in alinement with one another; The layshaft 4 is arranged parallel to the shafts 2- and 3, suitable ballbearings being provided for each of these shafts. Loosely mounted uponthe end of the driving shaft 2 is a sprocket gear Wheel 5 which may beof any usual construction and is connected by means of a'chain, notshown, to a similar gear wheel 6 rigidly mounted upon the lay shaft. 4.The latter has also rigidly secured thereto. two other sprocket gearwheels, 7, 8, respectively, the-sprocket gear wheels, 7, 8, beingconnecte by means of chains, shown, to corresponding gear wheels, 9, 10,respectively, loosely mounted upon the driven shaft 3. The lay shaft 4,also carries at its opposite end a gear wheel 11 adapted to engagedirectly with .a gear wheel 12 mounted upon a sleeve 13 carriedby thedriven shaft 3, the sleeve 13 being. adapted toslide longitudinallyalong the shaft 3 and to drive the latter by means of feathers andkeyways on the shaft and gear wheel respectively. The gear wheel 5isprovided on its inner face with one element 14 of a clutch device, theother element of which is constituted by a bushing 15 provided'withdouble clutch members 16, 17, on either. face of the bushingrespectively; The bushing 15 is adapted to slide longitudinally on thedriving shaft 2 and to be driven by thereon. The inner end of the drivenshaft 3 is provided with si' 'lar clutch members 18 adapted to engagewith the clutch members 17 when the bushing 15 is moved towardtheright', so as to couple the driving so i '. 35 moved; toward theright 45. ing

and driven shafts 2 3, gether. The gear wheels, 9, 10, are adaptedtoib'e' coupled to the drifian shaft 3 by a similar clutch devicecomprising a bushing 19 moved toward'the left thereby causing the clutchmembers 14,

16 to engage with one another so that the gear wheel .5 is drivendirectly by the shaft'2. The gear wheel 5 by means of its chain caringalso drives the gear wheel 6 and the ay shaft 4 at a speed dependentupon the relative numbers of teeth on the wheels 5 and'6. The. rotationof the lay shaft 4 is transmitted to the gear wheels 9 and 10 by meansof their corresponding chain gearing, and if the clutch bushing 19,bemoved toward the left so that the clutch members 20, 22 engage withone gear wheel 9 is coupled to the another the driven shaft 3 and drivesthe latter at a corresponding speed. i

In order to increase the speed of rotation of the shaft 3 the clutchbushing 19 may be in whichcase the gear wheel 10 is coupled to thedriven shaft 3 owing to the engagement of the clutch members 21 and 23,the gear wheel 9.in this gase rotating loosely upon the driven shaft 40speed as the driving shaft 2 these two shafts- In order to drive theshaft 3 at the same may be directly I coupled y'restoring the clutchbushing 19 to its middle or inoperat1v'e ,positi0n and moving 15 towardthe right so that the clutch members 17, 18, engage with one another andconnect the shafts 2 and 3 directly together. Under these circumstances.the lay shaft 4 and all the gear wheels are stationary.

In order to obtain'a reversal in the direc- .(t1on of rotation of thedriven shaft 3 the clutch bearing 15 should be moved toward the left sothat the lay shaft 4 isdriven from the drlving shaft 2 and the bushing13 carrying the gear wheel 12 is moved toward the right, so that thegear wheels 11, 12, are -m-e ngagement with one another.

Smce these gear wheels are adapted to intermesh directly with each otherthe rotatron of the shaft 3 produced thereby will evidently be oppositein direction to that produced by the chain-driven gear wheels.

In order to compensate for wear in the 4 5 chains connecting the severalpairs of gear mechanically to-v .thus enabling the lay shaft 4 to towardor away from the shafts 2 andv 3 In order to effect greater compensationthan that above described for wear on the the clutch bush-' wheelstogether the lay shaft 4 may be so supported that the distance betweenthe axes of the shaft 4 and the shafts 2 and 3 may be adjusted. Such aconstruction is illustrated in Fig. 2, in which the bearings 24 of thelay shaft 4 are mounted eccentricallyin caps 25 carried by'the gear-box-1. As shown in the drawings the cap 25. is secured to the gear-box bymeans, of bolts 26 adapted to enter holes in the gear-box,.th'e ajustment of the position of the lay shaft 4 being effected by rotatingthe cap 25 before inserting the bolts 26. The method of efiecting thisadjustment will beclearly understood from a consideration of Fig. 2'. ISince the adjustment above referred to necessarily varies the distancebetween the centers of thepair of intermeshing gearwheels, 11, 12,provided for obtaining a reversal in the direction of rotation of the'driven shaft, 3, the teeth of the gear-wheels 11, 12, are preferably ofinvolute form and of considerable length.

An additional arrangement is illustrated in Fig. 2, in which the gearwheelll, instead of being directly mounted on the lay shaft 4 is mountedon a hollow boss or pivot- 27 secured to the gear box, and is arrangedto be driven by means o f'the lay shaft 4 through a universal joint orcoupling 34,

be moved Without varying the distance between the axes of the-gearwheels 11 and 12. v v

chains and consequently increasing their length,-each pair ofthe gearwheels 5, 6, 7,

8, 9, and 10 respectively may be so constructed that a portion ofthewidth of the wheel may be of greaterdiameter than other portions, eachportion of the same wheel having, however, the same number of teeth.Such an arrangement is illustrated in Fig. 2, in which the gear wheels 5and 6 are each divided into two portions 28, 29 and 30, 31

respectively. When-a new chain is mounted on the gear wheels it is firstplaced on the portions 28, 30 of the gear wheels and as the length'ofthe chain increases by a predete'rmined amount due to wear the chain istransferred to the portions 29,, 31, of the gear wheel. It willbe.understood that the gradual increase in the length of the chain iscompensated for by the adjustment of the shaft bearing as shown in Fig.2-and that the transfer of the chain from the portion of the gear wheels28, 30 .to the portions 29, 31, need only be effected when the increasein length has-become so great that the slack can no longer be taken upby the adjustment of the shaft bearing.- Suitable guides may be providedfor preventing the chain from'ridmg up on the wheels, a groove beingformed in the center of the teeth as shown 2180 mas er at 32,on the gearwheel 9 in Fig. 2, the

groove 32 serving to accommodate a projection or projections formed uponthe chain. In cases in which the chain is not provided with. suchprojections the gear wheels may be provided with lateral flanges 33 asshown on the gear wheel 10.

It will be understood that the invention gear wheel loosely mountedthereon, a driven shaft in axial alinement therewith, and a looselymounted sprocket gear wheel on said driven shaft, of a lay shaft,corresponding sprocket gearwheels rigidly mounted thereon, connectionsbetween said wheels on the driving and driven shafts and the gears onthe lay shaft, clutch devices for the sprocket gearsv of the driving anddriven shafts, a

longitudinally adjustable reversing gear mounted on the driven shaft,and a corresponding gear mounted to turn with the lay shaft.

2. In a transmission mechanism, the com bination of a driven shaft, asprocket gear wheel mounted thereon, another shaft, a correspondingsprocket gear wheel thereon, a connection between said wheels, a pair ofreversing gears mounted to turn with the respective shafts, a laterallyadjustable bearing for one of the shafts, and a coupling between theadjustable shaft and its 1"evers-' 'ing gear.

- 3; In a transmission mechanism, the combination of a shaft having alaterally adjustable bearing, on said shaft, a gear mounted on a fixedbearing surrounding said shaft, and a driving connection between theshaft and the last mentioned gear.

4. In a transmission mechanism, the combination of a shaft having alaterally adjustable bearing, a sprocket gear mounted on said shaft, agear mounted on a fixed I bearing, and a flexible coupling between theshaft and said gear for driving the same.

5. In a change speed mechanism, the combination with a driving shaft, aloosely mounted sprocket'gear thereon, a driven shaft mounted in axialalinement therewith, and a loosely mounted s rocket gear on said drivenshaft, of a paral el lay shaft, laterally adjustable bearings for saidlay shaft, rigidly mounted sprocket wheels on said lay shaft,connections between the corresponding sprocket gear wheels of thedriving and driven shafts, and the gears on the lay shaft, clutchdevices for said gears, a longitudinally adjustable reversing gear asprocket gear mounted wheel mounted on the driven shaft, a correspondinggear wheel mounted on a fixed bearing surrounding the lay shaft, and acoupling between the lay shaft and the said gear wheel.

6. In achange speed mechanism, the combination with driving, and drivenshafts,

and sprocket gear wheels mounted thereon, of a lay shaft, sprocket gearwheels mounted on said lay shaft, connections between the correspondingsprockets on said driving and driven shafts, and the gears on the layshaft, said sprocket gear wheels being d1- vided into a pluralityofportions of differefit diameters as and for the purposes set fort WALTERPHILLIPS. HENRY W. ALLING

